retail stores which cater to occidental or non Chinese in general will hire English speaking person,but retail jobs do not pay well.
Look into bookstores,liquor stores,catering companies,travel agency which cater to foreigners in HK.
Say a bookstore which sell books written in English.most shoppers whether Chinese or non Chinese will speak some English.
I have been to Italian deli where the Italians speak terrible English and no Chinese but the patrons know what they want to buy and dont mind if the clerk speaks terrible English.
Also gift shops in fancy upscale hotels such as Shangri La ,I have come across non Chinese Asians working there and all they speak is English.